I've known about SCP for a while, and decided I wanted to contribute and make my mark on such a cool project. Looking for criticism that will specifically prepare this piece to grab a spot on the list and stay there.

Note: I correct the given mistake only once. If you do not use the metric system, I will only make a single comment about it, even if it appears again in the rest of the article. If the draft has many language problems, I will only correct the most glaring ones. Unnecessary information will show as the copied text with the redundant information stricken through.

SCP-XXXX’s container is to be kept at 4.5° Celsius at all times.

Avoid saying 'at all times', since it's the default state. Only state exceptions if they apply.

All personnel are to wear hermetically sealed protective suits featuring their own oxygen supply when studying the entity.

At no point should SCP-XXXX come into contact with air, food, or water shared by researchers.

This is already implied by the hazard suit, you don't need to mention it.

Its movements show clear signs of intelligence, and it has been observed exerting ripples throughout its body in various patterns.

Its movements show deliberate intent, suggesting sentience.

The entity’s assigned research team, lead by Dr. A. Ernhar, hypothesize this to be the entity’s only form of non-symbiotic communication.

Generally, try to avoid naming specific personnel. Out-of-universe, any specific name in the Procedures section a) violates the nameless/faceless theme of the Foundation and therefore feels out of place, and b) looks like a self-insert whether that was your intention or not.

The research team is sure that bonding non-viable subjects to the entity causes it to become “sick.”

This is a pretty large stumble in clinical tone:

''Subjects bonded with SCP-XXXX that are non-viable causes it to show symptoms comparable to symptoms of a disease in non-anomalous lifeforms.''

When exposed to increasingly colder temperatures, SCP-XXXX will enter a forced state of controlled hibernation, allowing the research team to safely study the entity’s composition and physical form. Dr. Ernhar has referred to this state as SCP-XXXX “sleeping” on multiple occasions, though there is no evidence that points toward the entity having any physiological need for rest.

So why would he call it that? Just say something like ''inactive'', it makes the researcher look like an amateur.

SCP-XXXX was briefly exposed to extreme heat, though its reaction became sporadic, described as violent by the research team. Several of the team members including Dr. Ernhar reported believing that heat caused the entity extreme pain, though there has been no physiological confirmation of this.

How would you confirm something like that? It doesn't have nerve endings, right?

That being said, it would be a crime against advancement to deny this request as I believe this entity could unlock unprecedented secrets of both human and anomalous physiology.

Okay? Why? Why is this guy so obsessed with it, the human lives are clearly not worth it.

As leader of the team researching SCP-XXXX, and as one intimately aware of the dangers this entity represents, it is my official recommendation that my team and I be allowed to begin experimentation with Class D personnel as potential hosts for SCP-XXXX.

The entity is contained, and personnel (Even D-Class) doesn't grow on trees.

These would include proper storage of a humanoid anomaly fit to restrain a being of superhuman strength, testing apparatuses designed to measure changes in both physical form and mental stability, and the suite of tools that would be typical for running tests on the human physiology.

Why is this entire article described through a research team? It seems unnecessary and breaks the tone multiple times.

As for the characters, they just seem completely obsessed with it, to the point that they declare it to grant some fundamental evolutionary understanding which we apparently lack? What draws him to that conclusion, intuition?

Apart from the bizarre personnel behavior, we have absolutely no background to the SCP itself.

Why does this thing exist? Why does it have these properties? What makes it different story-wise from any other monster already on the mainlist? Who made it? Was is made at all? If it was, for what reason? Where and how did we find it?

So the good parts are the potential it represents. You could write a narrative about one or more personnel obsessing over testing it, but you need a good justification for that. Something like:

- SCP genuinely has the potential to help humanity/the Foundation/etc.

- Testing with the SCP poses a risk significant enough for people to disagree.